Catalogs > Automation Systems Catalog > Programmable Controllers > SLC 500 System > I/O Modules and Hardware
I/O Modules and Hardware
| I/O Adapter Modules |  |
Chassis and Hardware | |
1746 I/O Module Overview | |
Digital I/O Modules | |
| Analog I/O Modules | |
Specialty I/O Modules | |
Removable Terminal Blocks | |
Distributed I/O | |
Many 1746 I/O modules provide color-coded removable terminal blocks. These removable terminal blocks let you replace I/O modules without rewiring. A matching color band on the front of the module helps you match the terminal block to the correct type of module. Each terminal block includes self-lifting pressure plates for secure wiring and has barriers on 3 sides to guard against AC cidental shorting of wiring.
1746 Removable Terminal Blocks
| Cat. No. | Number of I/O, Max. | Number of Terminals | Contact Plating |
Fuse Size, Max. | Typical Application |
| 1746-RT25R | 16 | 18 | Gold Plated | — | General-purpose red terminal block, used with AC I/O modules 1746-IA16, -IM16, -OA16, -OAP12 |
| 1746-RT25B | 16 | 18 | Gold Plated | — | General-purpose blue terminal block, used with DC I/O modules 1746-IB16, -IC16, -IH16, -ITB16, -ITV16, -IV16, -OB16, -OBP16, -OBP8, -OV16, -OVP16, -IN16, -IG16, -OG16 |
| 1746-RT25C | 16 | 18 | Gold Plated | — | General-purpose orange terminal block, used with relay contact output modules 1746-OW16, -OX8 |
| 1746-RT25G | 16 | 18 | Gold Plated | — | General-purpose/specialty green terminal block, used with specialty I/O modules 1746-HSCE, -HSCE2, -IO12, -NR4, -NI8, -NI16I, -NI16V, -NO8I, -NO8V |
| 1746-RT26 | — | 2 | Gold Plated | — | External power source terminal block, used with analog output modules 1746-NO4I, -NO4V |
| 1746-RT27 | 4 | 8 | Gold Plated | — | Used with analog output modules 1746-NO4I, -NO4V |
| 1746-RT28 | 4 | 12 | Gold Plated | — | Used with analog input/combo modules 1746-NI4, -NIO4I, -NIO4V |
| 1746-RT32 | 4 | 18 | Gold Plated | — | Green terminal block, used with thermocouple input module 1746-NT4 |